diff --git a/modules/actual-server/default.nix b/modules/actual-server/default.nix
index 18e93c6..4e7946b 100644
--- a/modules/actual-server/default.nix
+++ b/modules/actual-server/default.nix
@@ -9,7 +9,7 @@
     wantedBy = [ "multi-user.target" ];
     description = "user service for the actual budgeting server instance";
     environment = {
-      ACTUAL_PORT = 9002;
+      ACTUAL_PORT = "9002";
     };
     serviceConfig = {
       Type = "simple";